Change exact area in binary images from 1 to 0

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Eliska Paulikova
Eliska Paulikova 2022-11-5
评论： Eliska Paulikova 2022-11-5
Hello, I have this binary image, I know the center and the radius of that circle, and I would like to change this circle to black so from 1 to 0. My goal is to see only the little line without the circle. How can I do it?
Thank you so much

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Matt J
Matt J 2022-11-5
Ran in:
load BW
hole = bwareafilt(~BW,1,'smallest') ;
BW=BW& ~imdilate(hole,strel('disk',5));
imshow(BW)
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Matt J
Matt J 2022-11-5
编辑：Matt J 2022-11-5
Ran in:
You're welcome, but please Accept-click the answer if it addresses your question.
The ~ operator is logical complement,
~0,
ans = logical
1
~1
ans = logical
0

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